"amonia" smell

I have a 04 infinite g35x (awd) automatic sedan. My issue is while I’m driving mainly on acceleration I get this really strong odor like ammonia inside the car. If I open the sunroof or a window its gets worse. Its goes awaybif I use the a/c. I have no idea what is causing this its been like this abt 2 months now. Can anyone tell me what it could be causing this? Its driving me nuts.

Are you sure a cat didn’t whiz into the intake vents at the base of the windshield?

Seen that one before.


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